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@PHDTHESIS{Lorenz:21170,
      author       = {Lorenz, Boris},
      title        = {{C}ontact {M}echanics and {F}riction of {E}lastic {S}olids
                      on {H}ard and {R}ough {S}ubstrates},
      volume       = {37},
      school       = {RWTH Aachen},
      type         = {Dr. (Univ.)},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zenralbibliothek, Verlag},
      reportid     = {PreJuSER-21170},
      isbn         = {978-3-89336-779-5},
      series       = {Schriften des Forschungszentrums Jülich.
                      Schlüsseltechnologien / Key Technologies},
      pages        = {IV, 121 S.},
      year         = {2012},
      note         = {Record converted from JUWEL: 18.07.2013; RWTH Aachen,
                      Diss., 2012},
      abstract     = {This thesis presented an experimental study of contact
                      mechanics and rubber friction. These are topics of huge
                      importance in Nature and in technology. Despite its
                      importance and the theoretical and experimental effort
                      carried out, contact mechanics and rubber friction are still
                      not well understood t day. The motivation of this work has
                      been to compare the approach of Persson to contact mechanics
                      and rubber friction with state-of-the-art theories and to
                      test its accuracy by comparing the predictions with
                      experimental results. The experiments described here not
                      only address the two topics contact mechanics and rubber
                      friction but also different applications that are of great
                      importance in many technological systems. It is the first
                      time that experimental data has been used to test the
                      approach of Persson in detail. Very good agreement has been
                      found with the Persson approach, while the predictions of
                      the standard theories disagree even qualitatively. This is
                      due to severe approximations made in the state-of-the-art
                      theories, such as the neglect of longrange elastic
                      deformations and the oversimplified description of surface
                      roughness. Very good agreement has been found when the
                      approach of Persson was applied to different problems
                      involving contact mechanics, including the leak rate of
                      seals or the squeeze-out of a fluid. There are no fitting
                      parameters used in the analysis. Within the accuracy of the
                      experiments, the theory on contact mechanics by Persson has
                      been shown to work very well. In the last section of the
                      thesis, the predictions of a rubber friction theory based on
                      the contact mechanics approach are tested using a novel
                      instrument that has been designed. The experimental data
                      could be explained well by the theory if different energy
                      dissipation mechanisms are taken into account and the rubber
                      friction theory of Persson explains the results within the
                      accuracy of the measurements. It is the only physical model
                      that can presently be applied to rubber friction on hard and
                      rough substrates. More work needs to be done in order to
                      test the influence of temperature effects (flash
                      temperature) on rubber friction during energy dissipation.
                      This is crucial for technical problems, such as friction of
                      a tyre or dynamic seals. Further study of rubber friction on
                      different substrates, e.g. road surfaces and ground steel
                      surfaces, is needed to test the theory in detail.},
      cin          = {IAS-1 / PGI-1},
      ddc          = {500},
      cid          = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106},
      pnm          = {Grundlagen für zukünftige Informationstechnologien},
      pid          = {G:(DE-Juel1)FUEK412},
      typ          = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
      url          = {https://juser.fz-juelich.de/record/21170},
}